Key Takeaways: Aircon Repair Insights
* The average aircon regas cost in Australia is $280 AUD, according to the Repair Cost Hub Index.
* Basic aircon diagnostic service fees range from $120 to $180 AUD depending on your state.
* Major component repairs, such as a compressor replacement, cost between $1,200 and $2,200 AUD.
* All air conditioning repairs involving refrigerant must be performed by an ARCtick-licensed professional under AS/NZS 3823 standards.
There is nothing worse than the Australian summer sun beating down on your home, only to find your air conditioning unit blowing warm, stagnant air. Whether you rely on a Daikin split system or a ducted Mitsubishi setup, an aircon not cooling is a common frustration. Based on Repair Cost Hub analysis of trade quotes across all 8 Australian states and territories, updated May 2026, most cooling failures stem from preventable maintenance issues or minor mechanical faults.
Why is Your Aircon Not Cooling?
An air conditioning system is a complex machine that requires a balance of refrigerant pressure, clean airflow, and electrical integrity. When one component fails, the entire cooling cycle halts. Here are the most frequent culprits identified by the Repair Cost Hub Index.
1. Clogged Air Filters
The most common cause of poor cooling is a restricted airflow caused by dust and debris buildup. If your filters are clogged, the evaporator coil will freeze over, preventing cold air from entering your room. Cleaning your filters every 3–6 months is a simple way to maintain efficiency. You can view our air-con-servicing-cost guide for more details on preventative maintenance.
2. Refrigerant Leaks
If your aircon is running but not cooling, a refrigerant leak is a likely cause. Refrigerant is the lifeblood of the system; if the levels drop due to a seal failure or pipe crack, the system cannot remove heat from your home. According to the Repair Cost Hub Index, the average cost for a professional refrigerant recharge (regas) is $280 AUD.
3. Faulty Compressor
The compressor is the heart of your outdoor unit. If it fails, the cooling process stops entirely. Compressor failure is one of the most expensive repairs, often costing between $1,200 and $2,200 AUD, according to the Repair Cost Hub Index. In many cases, if the unit is older than 10 years, it is more cost-effective to opt for a new installation rather than a repair. Check our aircon-replacement-cost calculator for current market rates.
Repair Cost Hub Index — Average Repair Costs by State
Pricing for air conditioning repairs varies by region due to technician demand and travel costs. The following data is based on the Repair Cost Hub Index for 2026.
| State | Call-out Fee (AUD) | Basic Repair (AUD) | Average Regas (AUD) |
|---|---|---|---|
| New South Wales | $150 | $350 | $290 |
| Victoria | $140 | $320 | $270 |
| Queensland | $160 | $380 | $300 |
| Western Australia | $170 | $400 | $320 |
| South Australia | $130 | $300 | $260 |
| Tasmania | $145 | $330 | $275 |
| Northern Territory | $220 | $450 | $350 |
| ACT | $155 | $360 | $285 |
Understanding Regulatory Standards
In Australia, any work involving the internal refrigerant system must be performed by a technician holding an ARCtick license. This is a federal requirement under AS/NZS 3823 safety standards. Always ask to see the technician's license before they begin work to ensure your warranty remains valid and the work meets safety regulations. Whether you are in Sydney or Perth, professional certification is non-negotiable.
How to Avoid Costly Aircon Repairs
Prevention is cheaper than a breakdown. To keep your system running optimally:
* Clean Filters Monthly: During peak summer months, remove and vacuum your filters.
* Clear Outdoor Debris: Ensure there is at least 50cm of clearance around the outdoor unit to prevent overheating.
* Annual Servicing: Book a professional service annually to check pressure levels and electrical connections. View current rates at our aircon-service-cost page.
Frequently Asked Questions
What should I do if my aircon is blowing warm air?
First, check your thermostat settings to ensure it is set to 'cool' mode and a temperature lower than the current room temperature. If that fails, inspect your outdoor unit to ensure it is running and not obstructed by garden debris. If the issue persists, contact a licensed professional for a diagnostic check.
Is it cheaper to repair or replace an old aircon?
It is more cost-effective to replace an aircon unit if the repair cost exceeds 50% of the price of a new system, according to the Repair Cost Hub Index. Older units are often inefficient, and repair parts for discontinued models can be difficult and expensive to source.
Why does my aircon trip the power switchboard?
An aircon tripping the safety switch indicates an electrical fault, such as a short circuit in the motor or a failing capacitor. You should immediately turn off the unit at the power source and call a qualified electrician to inspect your electrical components to prevent a fire hazard.
How long does a typical aircon repair take?
Most standard repairs, such as cleaning coils or minor electrical fixes, take between 1 to 3 hours to complete. Complex repairs, such as replacing a compressor or major refrigerant leaks, may require the unit to be taken to a workshop and can take several days.